Remove/install steering knuckle - AR33.25-P-0400MCC

MODEL 451.3/4 

Fig 1: Identifying Steering Knuckle Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
1	Remove left or right splash shield of front brake	* for USA only	AR42.10-P-0233MCU
		* not for USA	AR42.10-P-0233MCC
2	Unscrew nut (2) and unhook link rod (3) from suspension strut (4).	Counterhold threaded stud of link rod (3). Screwdriver bit	Fig 2
		Tool assortment for stabilizer assembly	Fig 3
			*BA32.20-P-1004-02I
3	Unscrew nut (5) and pry tie rod end (6) off steering knuckle (1) using puller and unhook	Pry off tie rod end (6) carefully in order to avoid damage to the rubber boot. : Check rubber boot, replace tie rod end (6), if necessary. Puller	Fig 4
			*BA46.40-P-1001-01F
4	Unscrew screw (7) and pull the left front rpm sensor (L6/1) or right front rpm sensor (L6/2) out of the upright (1)
5	Using a suitable tool unclip the bracket (8) on the suspension strut (4) and place the left front rpm sensor (L6/1) or right front rpm sensor (L6/2) to one side
6	Undo nut (9) and remove bolt (10) from steering knuckle (1)		*BA32.25-P-1003-04D
7	Mount clamping device (11) onto steering knuckle (1), insert retaining pin (12) into the bore in the steering knuckle (1) and spread the steering knuckle (1) using the expansion bolt (13)	Tighten expansion bolt (13) until resistance is felt, do not overtighten, as otherwise the clamping device (11) or the steering knuckle (1) may be damaged. : Push steering knuckle (1) all the way upwards to the end stop. Tensioning device	Fig 5
8	Unscrew nut (14) and, using puller, pry flange ball joint (15) off the steering knuckle (1)	Press out flange ball joint (15) carefully in order to avoid damage to the rubber boot. Push transverse control arm on front axle down only as far as required, as otherwise the rubber bushings in the transverse control arm may be damaged. Counterhold the flange ball joint's threaded pin (15) using a Torx wrench (size T40). : Check rubber boot, replace flange ball joint (15), if necessary. Puller	Figure
			*BA33.25-P-1001-01D
9	Detach steering knuckle (1) from suspension strut (4) and remove	When replacing the steering knuckle (1) remove the clamping device (11).
10	Install in the reverse order
11	Perform wheel alignment check	without recording the vehicle level	AR40.20-P-0200MCC
		with recording the vehicle level	AR40.20-P-0200MCE

FRONT AXLE STABILIZER BAR

Number	Designation		Model 451.3/4
BA32.20-P-1004-02I	Nut, link rod to suspension strut	Nm	58

SUSPENSION STRUTS

Number	Designation			Model 451.3/4
BA32.25-P-1003-04D	Bolt, fastening shackle of suspension strut at swiveling bearing	Stage 1	Nm	30
		Stage 2	∠°	180

AXLE HOUSING, STEERING KNUCKLE

Number	Designation		Model 451.3/4
BA33.25-P-1001-01D	Nut, flange ball joint to swivel bearing	Nm	50

TIE ROD

Number	Designation		Model 451.3/4
BA46.40-P-1001-01F	Self-locking nut, tie rod to steering knuckle	Nm	34

Fig 2: Identifying Screwdriver Bit (126 589 00 10 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Tool Assortment For Stabilizer Assembly (450 589 00 17 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Puller (450 589 01 33 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Tensioning Device (451 589 00 31 00)

Courtesy of MERCEDES-BENZ USA

Fig 6: Identifying Puller (454 589 00 33 00)

Courtesy of MERCEDES-BENZ USA